
AB(diag)-89
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
2 CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS LH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Remove the instrument panel lower cover
and column cover, and disconnect the connec-
tors (AB7) and (AB2).
3) Remove the console front panel and discon-
nect the connector (AB9).
4) Disconnect the connectors (AB6, AB17,
AB18) from airbag control module.
5) Connect the connector (1AH) in the test har-
ness AH to the connectors (AB6, AB17, AB18).
6) Connect the connector (2AH) in the test har-
ness AH and the connector (1AG) in the test
harness AG.
7) Disconnect the connector (AB13) from the
front sub sensor LH, and then connect the con-
nector (1H) in the test harness H to connector
(AB13).
8) Measure the resistance between connector
(4AG) in the test harness AG and connector
(3H) in the test harness H.
Connector & terminal
(4AG) No. 7 — (3H) No. 5:
(4AG) No. 9 — (3H) No. 6:
Is the resistance less than 10
Ω?
Go to step 3. Replace the airbag
main harness
along with body
harness.
3 CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS LH).
Measure the resistance between connector
(4AG) in the test harness AG and chassis
ground, and the resistance between connector
(4AG) terminals in the test harness AG.
Connector & terminal
(4AG) No. 7 — Chassis ground:
(4AG) No. 9 — Chassis ground:
(4AG) No. 7 — (4AG) No. 9:
Is the resistance 1 MΩ or
more?
Go to step 4. Replace the airbag
rear harness along
with body harness.
4 CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS RH).
1) Disconnect the connector (AB16) from the
front sub sensor RH, and then connect the con-
nector (1H) in the test harness H to connector
(AB16).
2) Measure the resistance between connector
(4AG) in the test harness AG and connector
(3H) in the test harness H.
Connector & terminal
(4AG) No. 14 — (3H) No. 5:
(4AG) No. 12 — (3H) No. 6:
Is the resistance less than 10
Ω?
Go to step 5. Replace the airbag
main harness
along with body
harness.
5 CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS RH).
Measure the resistance between connector
(4AG) in the test harness AG and chassis
ground, and the resistance between connector
(4AG) terminals in the test harness AG.
Connector & terminal
(4AG) No. 12 — Chassis ground:
(4AG) No. 14 — Chassis ground:
(4AG) No. 12 — (4AG) No. 14:
Is the resistance 1 MΩ or
more?
Go to step 6. Replace the airbag
rear harness along
with body harness.
Step Check Yes No
15WRX_STI_US_EN.book 89 ページ 2015年2月13日 金曜日 午前11時20分